Griswold



R. S. BRYANT, DECDI o. n. IOBSKI AND 1. n. emswow, SPECIAL ADMINISTRATORS. METHOD OF FORMING DRIVING LUG$ 0N FELLY BANDS, RIMS, AND THE LIKE- APPLICATION FILED SEPI- 2|, I916. I 1,318,048. Patented Oct. 7,1919.

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THE COLUMBIA PLANOGRAPH co., WASHINGTON, D. c.

R, S. BRYANT, DEC'D. o. H. JOBSKI AND 1. n. GRISWOLD. SPECIAL ADMINISTRATORS.

- METHOD OF FORMING DRIVING LUGS 0N FELLY BANDS, RIMS, AND THE LIKE.

APPLICATION FILED SEPT- 21, 19|6| 1,318,048. Patented Oct. 7 1919.

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Specif catiomof L tters Patent.

Patented 0a; 7, 13519? Original application filearebruar ae, is as'rialno. 80,739. Dfvided andthis applicationiilelhsibtm'bi' 21; 1916; Serial-11691213477;

Toallwhomz't may concern: I A

Be it knoWnthat-'\ve,'-Orro J o s'KI and J AMES H: GRISWOLD, both OllI-lZBHS" of the United States, and respectively residents of Cleveland and East Cleveland, county of Cuyahoga, State of Ohio, specialtadministrato'rs of the estate of'RIcHARn Si BRYANT, deceased, 'late acitizen'o'f the United States, andresident' of Cleveland, Ohio, (as :by reference to the duly certified copy of letters of administration heretofore filed forifthe purpose of record Willunore fully' appean) be lieve 'said RICHARD S; BRYANT 1 to have invented anew and useful' lm provement in Methods of Foi'miiig'Driving Lugs on Felly-- Bands, Rims, and "thelike of hic'lithe following is'a specificatiomjthe principle of the y invention being herein explained and the bestmo de in which it was contemplated ap plying said principle, soas to distinguish it from other inventions. p

The present improvements relating as in dicated, to the manufacture of felly bands, rims" and the like, have more" particular regard to the manufacture of demountable rims for automobile Wheels, and of fellybands adapted for cooperative use therewith; Still more particularly, 1 such improvements relate to the formation on such rims, or bands; of so-called drivinglugs, it*being "the object of the present improved method to stamp such' driving lugs up from, and integral with, the material of the rim, or*band, such lugs} beingi severed along certain of their edges so as to form the" necessary abruptshoulders in order theta drivingengagement may be secured between the Wheel parts when assembled. To "the accomplishment of the foregoing and related ends, said invention; then, consists" ofthe steps here ina'fte'rf fully described and particularly pointed=out in'thecla'im. v

The-f annexed drawings and the following deseri 'ationset forth indetaircertaia steps embodying the invention, such disclosed steps constituting,however, but one of various Ways in'which theprinciple of the inventionm'ay be used;

In said 'annexed'drawings V I Figurel isafront 'elevational view of-a machine," or apparatus," adapted to form driving lugs in accordance with the im? proved method; Fig; 2-is a -side'elevational' view of such machine, With parts appearingin section;=Fig.i3is a central verticahse'c- 5 t-ionof thedies forming-part"of-suchlnech anism; Fig. 4: isfa similarcentral vertical section taken at right angles. to the 'section of Fig. 3;'Fig.=5 is'a plan view of a section of a typical rimyshown as rovidedlw'ith '6 driving lugs formed in accor ance with the present invention; Fig. 6is atransverse section of such rimytaken olf the plane'indi catedby the line'66, Fig; 5*; and Fig; 7*

is a longitudinal section of the sametaken on 5" the plane indicatedby the line 7-7', Fig-E 5.

Referring first to the driving-. lugs, or traction depressions, 'as theyare sometimes called Where thus formed" integrally from the material of the rim, or felly bandytl e detailed construction of one formbf these" lugs is fully illustratedin Figs. 5,6,and '7 The lugs A, thus illustrated are the ones usually provided on the rimA, and are two in number, spaced longitudinally, that" is, 7 5" circumferentially of the rim, and adapted to interlock with the single drivin' place-or lug= on the felly-band" (not il-list'rzited). These two lugs: are stamped from, and in tegral 'Wltll, the material of theirim, and

possibleto simultaneously. form not only both of the" aforesaid driving lugs, but also this valve stem opening, single operation accomplishing the results of a"plurality of steps, r Whereas heretofore the 1 opening" has been required tdbe'fpunched,"andthrtwo driving lugs their separately fitted, and W'eld ed or rivetedbn to the rim. i

i In it'sgeneral aspect, the mechanism illus trated in the drawingsns'adapted'to carry out theimprovedmethod may be regarded as a punch press, the stationary die of which, is mounted on a bed 2, while the movable die 3 is carried in a head f vertically reciprocable in an overhanging portion 5 of the framethat rises above such bed.

The stationary die 1, best illustrated in Figs. 3 and 4:, is of composite construction, the several parts being suitably wedged or clamped in a holder 6 that is firmly seated in the base of the machine. Such parts include a lower punch member 7 adapted to form the valve stem opening a in thetrim, and two bottom depression dies 8, as they may be called, one located on each side of such punch, and facing the same, these last named members being adapted to form the depressions in the under face of the rim, which produce the bosses or lugs A on the latters upper face.

The parts of the movable die, which is likewise a composite structure, are similarly secured in a holder 10 suitably attached to the reciprocable punch head. Such parts include a centrally disposed upper punch and shearing die 11 and two top depression dies 12. The latter are complementary to the bottom depression dies, and serve to form the upper faces of the lugs, or bosses, as they are stamped up by the action of the lower dies.

, As indicated by the term applied thereto, the central member 11 of the upper die is not merely complementary tothe punch 7 in the lower die, being formed with a cylindrical bore 13 into which such punch is adapted to fit, and through which the disklike sections a of the rim, cut by said punch, are discharged, but is also provided with two shearing edges 14 adjacent to the respective inwardly directed edges of the top depression dies 12. The action of these edges 14;, as the upper and lower composite dies are brought together, is to cooperate with the inwardly directed edges of the bottom depression dies 8 to shear or cut the rim transversely on each side of the valve stem opening. Each cooperating pair of depression-die members 8 and 12 accordingly lift the out edge of the boss or lug above the normal plane of the rim, and thus provide the desired abutting edges or, as clearly shown in Fig. 7

In order to assist in locating the rim for the operation of the'dies, two guides are provided, a front guide 15 and a rear guide 16, in connection with the lower die-holder 6. The transverse form of these guides is best shown in Figs. 2 and 3, from which it will be seen that the one has an abrupt edge to receive the corresponding straight edge a of the rim, while the other is suitably curved to fit the beveled flange a with which demountable rims are ordinarily formed on their rear sides.

It will be understood, of course, that the form of these uides may be varied to suit the character 0 the rim or band that is being operated upon.

The disks a cut out of the rim by the punch, represent the only waste material resulting from the operation, and such disks, as previously indicated, are discharged through the central opening, or bore 13, in the top punch member 11. The die-holder 10 is formed with a transverse slot 20 in open communication with the upper end of this bore, so that after a suflicient number of operations, the top-most disk will be discharged into this slot, it being understood that the disks will lit the bore snugly enough to be frictionally retained in place therein, without, however, preventing the inclusion of a fresh disk at the bottom, as successive blows are struck.

In such transverse slot 20, is a reciprocable plunger 21 that is adapted to be operated, incidentally to the reciprocation of the movable head at of the punch, through the medium of a bell-crank 22 pivotally attached to a bracket 23 on the front face of said head. The lower arm of this bell-crank has a sliding pivotal connection with one end of such plunger, while the upper arm of the crank, which is bifurcated, is provided with rollers 24 that run on inclined ways or cams 2-5, fixedly secured on the machine frame, adjacent to the path of movement of the punch head. Tension springs 26 serve to hold these rollers in contact with such cams.

Accordingly, it will be seen that, as the head 4 is raised, the lower arm of the bellcrank is swung inwardly so as to project the plunger 21 toward the rear, and thus discharge from the slot the topmost disk a providing a sufiicient number of disks have accumulated in the bore of the top punch member. This slot, it will be observed, grows larger toward the rear so as to facilitate uch discharge. On the contrary, as the head is lowered, the plunger is withdrawn so as to permit the next disk to rise into the slot, and thus be ready to be ejected'as just described. 7

It has been found that the method of manufacture exemplified in the operation of the foregoing mechanism, in actual practice, is adapted to form the complete structure illustrated in Figs. 5, 6 and 7, namely both of the driving lugs and the valve tem openings, in a single operation, and such operations may follow very rapidly, so that this step in the manufacture of a rim, or band, of the type in hand,.is accomplished with a celerity never realized with methods heretofore prevailing.

Other modes of applying the principle of the invention may be employed instead of the one explained, change being made as regards the process herein disclosed, provided the step or steps stated by the following claim or the equivalent of such stated step or steps be employed.

The following is therefore particularly pointed out and distinctly claimed as the invention:

The method of forming driving lugs on felly bands, rims and the like, which consists'in transversely cutting the material of such band, at two spaced points, the cuts being shorter than the width of the article in question, simultaneously embossing the portions of the material on the non-adjacent sides of the slits thus formed, so as to lift the corresponding cut edges above the normal plane of such article and form lugs inor'ro H. JOBSKI, JAMES H. GRISWOLD,

Special administrators of Riohawd S. Bryam, deceased.

Attested by NATHAN Laws.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. 0. 

